Though many telecom equipment names with strong U.S. exposure rallied in response to AT&T's...

Though many telecom equipment names with strong U.S. exposure rallied in response to AT&T's capex announcement, Calix (CALX-9.7%) fell hard today. A likely reason: Calix depends heavily on sales to tier-2 carriers who will be in the crosshairs of AT&T's Project Velocity, which seeks to both expand the company's wireline broadband reach and make its 4G network a broadband option in many rural areas.